chloroperoxidase (CiVCPO)-catalyzed tribromination of biaryls to transform freely rotating biaryl bonds to a sterically hindered axis is described. The strategy was used to produce 14 examples in analytical and preparative scales. The combination of Suzukicoupling and chemoenzymatic halogenations has enabled the chemoenzymatic one-pot synthesis of the tribrominated products in aqueous phase.
描述了钒依赖性氯过氧化物酶( Ci VCPO) 催化的联芳基三溴化反应,将自由旋转的联芳基键转变为空间位阻轴。该策略用于生成 14 个分析和制备规模的示例。Suzuki 偶联和化学酶促卤化的结合使得能够在水相中化学酶促一锅法合成三溴化产物。
Dynamic Kinetic Resolution of Biaryl Atropisomers via Peptide-Catalyzed Asymmetric Bromination
作者:Jeffrey L. Gustafson、Daniel Lim、Scott J. Miller
DOI:10.1126/science.1188403
日期:2010.6.4
widespread use of axially chiral, or atropisomeric, biarylligands in modern synthesis and the occurrence of numerous natural products exhibiting axial chirality, few catalytic methods have emerged for the direct asymmetric preparation of this compound class. Here, we present a tripeptide-derived small-molecule catalyst for the dynamic kinetic resolution of racemic biaryl substrates. The reaction proceeds